Keisha Buchanan co-founded Sugababes when she was 13; she recorded seven studio albums with the group; and she sang on such incredible pop songs as 'Overload', 'Freak Like Me', 'Round Round', 'Push The Button', 'About You Now'... we could go on and on.

Thank you very much Keisha - and best of luck with the solo career.

What do you think of Keisha leaving Sugababes? What sort of replacement will Jade Ewen be? Are you looking forward to Keisha's solo career?

Use the space below to leave your comments - and to share your favourite Keisha memories if you feel so inclined.